Cross-Site Request Forgery (CSRF) vulnerability to Cross-Site Scripting (XSS) was discovered by Ryo Onodera (Cryptography Laboratory Tokyo Denki University) in the WordPress Button Widget Smartsoft plugin (versions <= 1.0.1).
Deactivate and delete. This plugin has been closed as of June 8, 2022 and is not available for download. This closure is temporary, pending a full review.